Draw the electric field vs distance (from the centre ) graph for (i) a long charged rod having linear charge density `lamda gt 0 ` (ii) spherical shell of radius R and charge ` Q gt 0 ` .

Explanation

To solve the problem of drawing the electric field vs. distance graph for (i) a long charged rod with linear charge density \( \lambda > 0 \) and (ii) a spherical shell of radius \( R \) with charge \( Q > 0 \), we will analyze each case step by step.

### Step 1: Electric Field due to a Long Charged Rod

1. **Understanding the Electric Field Formula**:
The electric field \( E \) at a distance \( r \) from a long charged rod with linear charge density \( \lambda \) is given by the formula:
\[
E = \frac{2k\lambda}{r}
...